Is HDV 16:9 (letterbox window) really good for
filming a xxx video, or is a regular old style
4:3 aspect ratio mini-DV better ?

I believe regular minid-DV (4:3) was better
because of the HEIGHT of the frame, into which
you can get more a girl's body up close. Specially,
for filming strip-tease 4:3 is much better. It fills
the screen also.

16:9 HDV (High Def video) cameras are overtaking
porn. They film at 60 frame/sec as well as 30 frame/sec,
and 24 P.

The HDV file size is over 12 gigabyte for 1 hour of
video. You have to compress it to DVD size anyway (4.7 gigabyte).

Let me know your thoughts if you like working
with HDV, etc.